Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA316077 | ENA |
REPOSITORIES: ENA
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Project description:STAT5 interacts with other factors to control transcription, and the mechanism of regulation is of interest as constitutive active STAT5 has been reported in malignancies. Here LSD1 and HDAC3 were identified as novel STAT5a interacting partners in pro-B cells. Characterization of STAT5a, LSD1 and HDAC3 target genes by ChIP-seq and RNA-seq revealed gene subsets regulated by independent or combined action of the factors and LSD1/HDAC3 to play dual role in their activation or repression. Genes bound by STAT5a alone or in combination with weakly associated LSD1 or HDAC3 were enriched for the canonical STAT5a dimer motif, and such binding induced activation or repression. Strong STAT5 binding was seen more frequently in intergenic regions, which might function as distal enhancer elements. Genes bound weakly by STAT5a and strongly by LSD1/HDAC3 present a STAT5a monomer like motif, and are differentially regulated based on their biological role, genomic binding localization and affinity. STAT5a binding in monomer like motifs was found with increased frequency in promoters, indicating a requirement for stabilization by additional factors, which might recruit LSD1/HDAC3. Our study describes an interaction network of STAT5a/LSD1/HDAC3 and a dual function of LSD1/HDAC3 on STAT5-dependent transcription, defined by protein-protein interactions, genomic binding positions-affinities and motifs.
2016-11-30 | GSE79519 | GEO
Project description:STAT5 interacts with other factors to control transcription, and the mechanism of regulation is of interest as constitutive active STAT5 has been reported in malignancies. Here LSD1 and HDAC3 were identified as novel STAT5a interacting partners in pro-B cells. Characterization of STAT5a, LSD1 and HDAC3 target genes by ChIP-seq and RNA-seq revealed gene subsets regulated by independent or combined action of the factors and LSD1/HDAC3 to play dual role in their activation or repression. Genes bound by STAT5a alone or in combination with weakly associated LSD1 or HDAC3 were enriched for the canonical STAT5a dimer motif, and such binding induced activation or repression. Strong STAT5 binding was seen more frequently in intergenic regions, which might function as distal enhancer elements. Genes bound weakly by STAT5a and strongly by LSD1/HDAC3 present a STAT5a monomer like motif, and are differentially regulated based on their biological role, genomic binding localization and affinity. STAT5a binding in monomer like motifs was found with increased frequency in promoters, indicating a requirement for stabilization by additional factors, which might recruit LSD1/HDAC3. Our study describes an interaction network of STAT5a/LSD1/HDAC3 and a dual function of LSD1/HDAC3 on STAT5-dependent transcription, defined by protein-protein interactions, genomic binding positions-affinities and motifs.
2016-11-30 | GSE79518 | GEO
Project description:The dual role of LSD1 and HDAC3 in STAT5-dependent transcription is determined by protein interactions, binding affinities, motifs and genomic positions.
| PRJNA316073 | ENA
Project description:The dual role of LSD1 and HDAC3 in STAT5-dependent transcription is determined by protein interactions, binding affinities, motifs and genomic positions [RNA-seq]
| PRJNA316076 | ENA
Project description:~500,000 protein interactions have been identified in human but most binding affinities remain unknown, limiting quantitative investigation of interactome-function relationships. This gap can be filled by systematically measuring the affinities of minimal interacting protein fragments, the building blocks of interactomes. As a proof of principle, we experimentally measured 65,000 affinities involving 266 human PDZ domains (practically the complete "PDZome"), 424 human PDZ-Binding Motifs (~10% of the "PBMome") and 24 viral motifs. We determined binding constants for ~18,000 interactions that passed the detection threshold. Independent AP-MS experiments and database surveys demonstrated the strong agreement of quantitative fragmentomics with full-length protein interactomics. We evidence hot spots for viral interference, which allow a viral PBM, such as that of HPV-E6 oncoprotein, to impact the cell proteome way beyond its immediate binders. We propose to distinguish interactomes and complexomes, viewed as intrinsic and extrinsic properties linked by the law of mass action.
2022-10-14 | PXD027743 | Pride
Project description:Clinical responses to kinase inhibitor therapy in acute myeloid leukemia (AML) are limited by the inevitable development of resistance. A major contributor to resistance is early epigenetic adaptation, leading to persistence of a small number of leukemia cells. Here we show that inhibition of the epigenetic regulator lysine-specific deme-thylase 1 (LSD1) augments the response to inhibitors of the FLT3 kinase in AML. We demonstrate that combined FLT3 and LSD1 inhibition results in synergistic cell death of FLT3-mutant AML cells via proliferative arrest and apoptosis. The drug combination synergistically activates a pro-differentiative epigenetic and transcriptional program while simultaneously suppressing the activity of MYC target genes. High resolution multi-modal epigenetic analyses revealed that combined FLT3 and LSD1 resulted in the suppression of MYC-bound promoters and the activation of PU.1-bound enhanc-ers. Forced expression of MYC partially abrogated the drug effect, and regulon en-richment analysis in primary AML samples nominated STAT5 as a putative regulator of MYC gene expression. STAT5 is highly bound to the MYC blood super-enhancer and inhibition of FLT3 results in a loss of STAT5 binding and a loss of super enhancer acti-vation. Furthermore, knockdown of STAT5 augments LSD1-inhibitor induced cell death. LSD1 inhibition also directly represses MYC target genes which show specific accumulation of the repressive LSD1 substrate H3K9me1. We validated these findings in 67 primary AML samples including 19 FLT3-ITD positive AML samples, with the vast majority demonstrating improved responses with the drug combination. High MYC regulon activity was a predictor of response to the drug combination and RNA-seq on drug treated AML samples revealed suppression of MYC target genes. Finally, single cell ATAC seq on primary AML blasts treated ex-vivo with combined FLT3 and LSD1 inhibition results in a shift from MYC super enhancer-high to a MYC super enhancer-low cell state. Collectively, these studies provide preclinical rationale for the investiga-tion of dual FLT3 and LSD1 inhibition in clinical trial.
2024-03-21 | GSE190785 | GEO
Project description:HDAC3 and HDAC8 are members of class I deacetylases involved in several biological mechanisms and represent a highly sought-after therapeutic target for drug development. It is historically challenging to develop selective deacetylase inhibitors due to their conserved catalytic domains. HDAC3 also has deacetylase-independent activity, which cannot be blocked by conventional enzymatic inhibitors. Recent advances in proteolysis-targeting chimeras (PROTACs) provides an opportunity to eliminate the whole protein selectively, abolishing both enzymatic and scaffolding functions. Here, we report a novel HDAC3/8 dual degrader YX968 that induces highly potent, rapid and selective degradation of both HDAC3 and HDAC8 without trigging pan-HDAC inhibitory effects. Unbiased quantitative proteomics experiments further confirmed its high selectivity. This dual-specific degrader specifically ablates cellular pathways attributed to HDAC3 and HDAC8 and exhibits high potency in killing cancer cells. YX968 represents a new probe for dissecting the complex biological functions of HDAC3 and HDAC8.
2023-07-18 | PXD040941 | Pride
Project description:CD4 and CD8 T cells are vital components of the immune system. According to the kinetic signaling model, commitment to the CD4 or CD8 lineage is determined by whether persistent TCR signaling or cytokine signaling predominates, respectively. We found histone deacetylase 3 (HDAC3) is critical for the development of CD4 T cells, as its deletion leads to the generation of only CD8SP thymocytes. In the absence of HDAC3, MHC Class II-restricted OT-II thymocytes are redirected to the CD8 cytotoxic lineage. Analysis of histone acetylation and RNA-seq reveals HDAC3-deficient DP thymocytes are biased towards the CD8 lineage prior to positive selection. In addition, HDAC3-deficient DP thymocytes have increased IL-21R expression and STAT5 activation. As a result, HDAC3 is required to restrain cytokine signaling in DP thymocytes and is required for the generation of CD4 T cells.
2019-01-20 | GSE109529 | GEO
Project description:CD4 and CD8 T cells are vital components of the immune system. According to the kinetic signaling model, commitment to the CD4 or CD8 lineage is determined by whether persistent TCR signaling or cytokine signaling predominates, respectively. We found histone deacetylase 3 (HDAC3) is critical for the development of CD4 T cells, as its deletion leads to the generation of only CD8SP thymocytes. In the absence of HDAC3, MHC Class II-restricted OT-II thymocytes are redirected to the CD8 cytotoxic lineage. Analysis of histone acetylation and RNA-seq reveals HDAC3-deficient DP thymocytes are biased towards the CD8 lineage prior to positive selection. In addition, HDAC3-deficient DP thymocytes have increased IL-21R expression and STAT5 activation. As a result, HDAC3 is required to restrain cytokine signaling in DP thymocytes and is required for the generation of CD4 T cells.
2019-01-20 | GSE109530 | GEO
Project description:HDAC3 and HDAC8 are members of class I deacetylases involved in several biological mechanisms and represent a highly sought-after therapeutic target for drug development. It is historically challenging to develop selective deacetylase inhibitors due to their conserved catalytic domains. HDAC3 also has deacetylase-independent activity, which cannot be blocked by conventional enzymatic inhibitors. Recent advances in proteolysis-targeting chimeras (PROTACs) provide an opportunity to eliminate the whole protein selectively, abolishing both enzymatic and scaffolding functions. Here, we report a novel HDAC3/8 dual degrader YX968 that induces highly potent, rapid and selective degradation of both HDAC3 and HDAC8 without trigging pan-HDAC inhibitory effects. Unbiased quantitative proteomics experiments further confirmed its high selectivity. This dual-specific degrader specifically ablates cellular pathways attributed to HDAC3 and HDAC8 and exhibits high potency in killing cancer cells. YX968 represents a new probe for dissecting the complex biological functions of HDAC3 and HDAC8.
2023-03-20 | MSV000091511 | MassIVE